MailCheck.ai

About MailCheck.ai

UserCheck (formerly MailCheck.ai) is an email validation API that identifies and blocks fake or unwanted email addresses at signup. It detects disposable email addresses, forwarding/relay domains that mask real senders, public email providers, role accounts, and invalid syntax, and validates MX records for a domain. Queries return data such as domain authority, domain age, MX records and providers, SPF and DMARC status, and typo suggestions for common domain misspellings.

The service is aimed at developers and businesses wanting to filter fake signups from web forms and user registration flows, offering direct HTTP API access as well as integrations for WordPress, Laravel, Zapier, and Make. It offers a free plan (1,000 credits per month, 1 request per second, limited request log), a Pro plan with unspecified usage limits and added features (30-day request log, bulk validation, custom blocklist, provider information, webhooks, email support), and a custom Enterprise plan with priority support, security questionnaire support, a Data Processing Agreement, and a Service Level Agreement. The service is hosted in the EU and stated to be GDPR compliant.

Key features

• Detects disposable and temporary email addresses via an always-updated provider database
• Identifies email forwarding/relay services that mask real addresses
• Validates MX records to confirm a domain has working mail servers
• Flags public email providers (e.g. Gmail, Yahoo) and role accounts (e.g. support@)
• Suggests corrections for common email typos
• Validates email syntax against industry standards

Frequently asked questions